Ladder



FIG. 1 is a perspective view of a ladder showing an embodiment of the design;

FIG. 2 is a front view of the ladder shown in FIG. 1;

FIG. 3 is a rear view of the ladder shown in FIG. 1;

FIG. 4 is a is left side view of the ladder shown in FIG. 1;

FIG. 5 is a right side view of the ladder shown in FIG. 1; and,

FIG. 6 is a top view of the ladder shown in FIG. 1.

The broken lines in the drawings are included for the purpose of illustrating portions of the ladder and form no part of the claimed design. 

CLAIM The ornamental design for a ladder, as shown and described. 